I've had cause to raise 3 CS cases with BA in recent months; one in December, one in January and one in February. The response time to the first was the previously typical 2 - 3 days, the two since the new year were 12 and 14 days respectively. Finnair also told me that the response times to the missing TP queries they raise with BA via backchannels have gone up from a typical 1 - 2 days to weeks. This was all before the ME issues. I would conclude therefore that something is up at BA wrt to the handling of CS cases and so it maybe that awarding a few Avios without responding (and presumably hoping the complainant goes away) is linked to that.